反应详情

A solution of (S)-2-(4-chlorophenyl)-α-methyl-3H-imidazo[4,5-b]pyridine-3-acetic acid (3.0 g, 0.00995 mole), 1,1'-carbonyldiimidazole (1.61 g, 0.00995 mole) and dry tetrahydrofuran (60 ml) was stirred at room temperature for 1.75 hours with a stream of nitrogen bubbling through it. A solution of methylamine in tetrahydrofuran (20 ml of a 3.03M solution, 0.060 mole) was added and the reaction mixture was stirred at room temperature overnight under nitrogen. The solvents were removed under reduced pressure and the resulting solid was triturated in water, collected by filtration, rinsed twice with water, twice with 5% potassium hydroxide solution, and twice again with water. The solid was dissolved in hot isopropyl alcohol and filtered hot. Upon cooling to room temperature, solid precipitated which was collected by filtration and dried under high vacuum at 50° C. overnight to give 0.86 g (28%) of title compound, mp 218°-220° C.

1. customThe solvents were removed under reduced pressure
2. customthe resulting solid was triturated in water
3. filtrationcollected by filtration
4. washrinsed twice with water, twice with 5% potassium hydroxide solution
5. dissolutionThe solid was dissolved in hot isopropyl alcohol
6. filtrationfiltered hot
7. temperatureUpon cooling to room temperature
8. customsolid precipitated which
9. filtrationwas collected by filtration
10. customdried under high vacuum at 50° C. overnight